Electric fitting



G.' B. THOMAS.

ELECTRIC FITTING. l VAPPLICATION FILED APR.30. 1919.

Patented Jn. 27,4920.

2 SHEETS-SHEET 1,.

/fff 5. Thom/,Lgf 1/l G. B .dlIIIoII/ IAS- i ELECTRIC FITTING. y V n APPLICATION FILED APILSO, ISI-9. .y ESZMBI iatentezl. 27,' 1920,

GEORGE E. THOMAS, or EEIDGEPOETY ELECTRIC COMPANrgor CONNECTICUT.

Specification of Letters Patent.

,'CONNECTICE AssIGNOIt To THE BRYANT l -samengaan;CONNECTICUT, A CORPORATION OE ELECTRIC FITTING.

Patented Jan. 27, 1920.

.Application led April 30, 1919. Serial No. 293,685.

l To all 'whom t mag/.concern Be it known that I, GEORGE B. THOMAS, la

citizen of the United States of America, and

residing at Bridgeport, in the coun of Fairfield and' State of Connecticut, have -invented a'certain new and Improved Electric Fitting, ofv .whichthe following is aspeciication. I

My :invention relates to electric fittings and particularly to lighting fixtures, theob'- ject of my invention being to provide such `Vthe socket; Fig. 6 is a section through a shade holder vrand socket showing a modified kconstruction ;4

Ineansfor securing together a lamp socket anda reflector or its holder that the position of a lamp in the socket may be properly located with relation to the focal center of the reflector. Y

In the accompanying drawings- Figure 1 is a vertical section through a shade or reflector holder showing a lam socket mounted therein in accordance wit my invention; Figs. 2 and 3 are respectively plan view of the opposite ends of the socket;

Fig. 4 is a central section through the socket mount;

vFig. 5 is a development of one feature of Figs. 7 and 8 are plan views of the posite ends of the socket; and

Fig. 9 is a development of one feature of .the socket'.

There is little uniformity in the size and construction ofthe holders used in commercial lighting fixtures `for. supporting the associated reflectors or globes. Furthermore, there is a considerable variationin the 'focal points of different types of reflectors and globes. In order to secure the greatest efficiency in the lighting fixture, however, it is necessary that the lamp be located with approximate exactness at the focal center of the reflector or globe. The present invention aims to provide simple means by which the position of the socket may be adjusted to the dimensions of theshade or globe holder so that the lamp may be piroperly. positioned with relation to .the ocalucenter. of the-reflector. Whilethe inventien may be applied to variousty es of lamp socket and shade holders or Ire ectors," I lhave illustrated it in connection with a lamp socket and shade i `holders of the ty escommonly now used in commercial .ilighting xjture'sl:

Ithe parts of the in Figs. 1 to 5 the socket has-a one-piece porcelain bodylO with a central well to accommodate the screw shell 11 and center contact 12 of an Edison 'lamp receptacle, into which the lamp 13 is screwed. .Piercin the body outside the well are holes 14 and' 15 through which the wires are led to the binding screws 16 and 17 carried by `the terminal plates 18 and 19..v These plates are electrically `and vmechanically connected by screw bolts 20. and 21 to straps 22 and .23 at the back of the socket, and these in turn are respectively connected to the screw 'shell and center contact by screw bolts 24 and 25. In order to mount-the socket within" the shade 'holder 26 and to secure the parts together, legs 27 and 28v with offset feet 29 and 30, each tapped at 31 to receive a securing bolt 32 passing through the body of the socket.

The yoke piece 1s shouldered at 33 and a screw nipple 34 provided which. projects through a hole 35 in the top of the shade 4holder and its associated cap 36. The nut 37 secured on the nipple 34 serves to clamp shade holder together and to the yoke.4

Theadjustment of the socket with .relation to the shade holder is secured byv recessing the back or inner end'of the lsocket to form two like arcuate groups of steps 38, 39, 40 and 41 of any convenient depth,

I provide a carrier or yoke' having arranged on opposite sides of the axis of they f socket. Each step is of suflicient size tof/ accommodate one of thefet 29 or 30 of the golfe. The body off" the socket is pierced y corresponding groups of holes 42, 43, 44 and 45, .each opening to one of the ySteps and serving to accommodate lone of the securing screw/'bolts`32. j In order that the same screw bolt may be used irrespective of the particular pair ofsteps upon which the feet of the yoke are' rested, the holes are shouldered at`46, at a uniform distance from the face of the step, to form a seat for the khead ofthe bolt.

It is obvious thatby resting the feet of the yoke upon different pairs of steps the V lamp socket is shifted longitudinally on the axis of the shade holder, the extent of lon tudinal adjustment being limited yby t e distance between the step 38 on the one hand, and the step 41 onr the other hand.. For

anyk of the adjustments the same yoke and the same bolt are utilized, and the only operation necessary to effect the adjustment is to remove the bolts from one pai-roi holes 42-45 and insert them inthe pair leading to the ledges against which the feet of the yoke are rested, the socket being rotated "on its axis and longitudinally shifted to bring the desiredv pair of ledges into engagement` .with the feet of the yoke.

Figs. 6 to 9, the shade holder Turning to the modification shown in 47 here shown' is of a diii'erenttype and-depth. The socket carrying yoke is also of a slightly different construction, comprising a straight bar 48 carrying-the nipple 49 and'nut 50, and having at its opposite ends posts 51 which are adapted to-receive the screw bolts 32.; The main features of the socket construction are" the-same as those previously indicated, the sole. difference being that instead of providgronpsof external stepped ledges, -as in Figs. l to 5, the latter are substituted by a series of independent Wells 53, 54, 55 and 56 of different depths. With these communicate perfor-ations 57, 58, 59 and 60,

.through which the securing bolt passes, and

against the corresponding stepped shoulders 6l of which the heads of the bolts rest.

Obviously the same facility o f longitudinal adjustment of theSocket--on theaxis of the shade holder is alford'ed as in the construc\ tion iirst described. c

.Various other types of lized and modified constructions of the socket tocoperate therewith will readily loccur to those skilled'in the art. The underlying v. socket mount of such characterI that 'the thought :of the inventiongjsl to provide asocketinay be adjusted longitudinally-oii'the.

axis of the shade o rits carrierso that the.

lam may be brought into the 'focalcenter of tile shade" or globe.

I cl-aim as my invention?l l. The combination with a socketcarrier,

`of -a lamp socket lhaving longitudinally stepped seats, and means passing through.

the socketv from its lamp-receiving. end for securingsaid carrier and socket together on any 0f said seatssubstantial1y as described. 2.' The combination with a socket carrier, of a'la'mp socket .having on opposite sides of its axis corresponding groupsof long-i-A tudinally stepped seats adapted' to'receive the carrier, andmeanspa'ssing' throu h the socket from its lampreceiv-ingend or securing the' carrier tothe socket on 'any of said seats. f

' 3. The combination with of a lamp socket having on opposite .sides yoke may. be uti-h 'a socket carrier,

of its axis corresponding arcuate groups of 50 lamp receiving terminals, and at its opposite or inner end a series of stepped seats, together Awith means passing through .the socket from its lamp receiving end and lying outside the peripheralarea of the lamp receiving terminals for securingsaid -socket.l to'. an associated carrier resting against any of said seats.- A

6. A .lamp socket havingat its outer end orinner `end a series .of stepped seats, said socket `'being pierced outside the peripheral. area of the lamp receiving terminals in reg- 85 ister with each of said seats to permit the passage of `a securing means therethrough, substantially as described.

7 A lamp socket vhaving at or inner end a series v.of stepped seats, said of a lamp socket adjustable thereon Vlongitudiiially with' respect 4to the axis -of the socket, and having an insulating'base, lamp I receptacle .terminals mounted thereon. and' ceiving end of the `socket fornniting said base and carrier in longitudinally adjusted position in different 'relative rotary relations of the said-base and carrier.

" 9 The. combination 'with a socket carrier having spacedsupporting.1egs,o a socket having series oit'- seats therefor stepped. -lon' -gitudinally 'with relation to the axis of the socket, and means extending from the lamp receiving end of .the socketf and engaging theends 'of said supporting legs in anyI ofv the positions of adjustment' between the socket. 'and its carrier to secure-the same together. 1 4

In testimony whereof-'Il have; signed my name .to this-specification. v

- GEORGE B. THOMAS. j

5. A lamp sock-et having at its outerend lamp receiving terminals, and at its opposite its outer @lid i lamp receiving terminals, and at its opposite n v i 90 socket being pierced in register With-each of said' seats to permit the passage of a sesecuring means accessible from the Alamp re- 

